Let's roll up our sleeves and solve this. We have 991 and we're going to multiply it by 97, essentially adding 991 to itself 97 times.
Step 1: 0 + 991 = 991
Step 2: 991 + 991 = 1982
Step 3: 1982 + 991 = 2973
Step 4: 2973 + 991 = 3964
Step 5: 3964 + 991 = 4955
Step 6: 4955 + 991 = 5946
Step 7: 5946 + 991 = 6937
Step 8: 6937 + 991 = 7928
Step 9: 7928 + 991 = 8919
Step 10: 8919 + 991 = 9910
Step 11: 9910 + 991 = 10901
Step 12: 10901 + 991 = 11892
Step 13: 11892 + 991 = 12883
Step 14: 12883 + 991 = 13874
Step 15: 13874 + 991 = 14865
Step 16: 14865 + 991 = 15856
Step 17: 15856 + 991 = 16847
Step 18: 16847 + 991 = 17838
Step 19: 17838 + 991 = 18829
Step 20: 18829 + 991 = 19820
Step 21: 19820 + 991 = 20811
Step 22: 20811 + 991 = 21802
Step 23: 21802 + 991 = 22793
Step 24: 22793 + 991 = 23784
Step 25: 23784 + 991 = 24775
Step 26: 24775 + 991 = 25766
Step 27: 25766 + 991 = 26757
Step 28: 26757 + 991 = 27748
Step 29: 27748 + 991 = 28739
Step 30: 28739 + 991 = 29730
Step 31: 29730 + 991 = 30721
Step 32: 30721 + 991 = 31712
Step 33: 31712 + 991 = 32703
Step 34: 32703 + 991 = 33694
Step 35: 33694 + 991 = 34685
Step 36: 34685 + 991 = 35676
Step 37: 35676 + 991 = 36667
Step 38: 36667 + 991 = 37658
Step 39: 37658 + 991 = 38649
Step 40: 38649 + 991 = 39640
Step 41: 39640 + 991 = 40631
Step 42: 40631 + 991 = 41622
Step 43: 41622 + 991 = 42613
Step 44: 42613 + 991 = 43604
Step 45: 43604 + 991 = 44595
Step 46: 44595 + 991 = 45586
Step 47: 45586 + 991 = 46577
Step 48: 46577 + 991 = 47568
Step 49: 47568 + 991 = 48559
Step 50: 48559 + 991 = 49550
Step 51: 49550 + 991 = 50541
Step 52: 50541 + 991 = 51532
Step 53: 51532 + 991 = 52523
Step 54: 52523 + 991 = 53514
Step 55: 53514 + 991 = 54505
Step 56: 54505 + 991 = 55496
Step 57: 55496 + 991 = 56487
Step 58: 56487 + 991 = 57478
Step 59: 57478 + 991 = 58469
Step 60: 58469 + 991 = 59460
Step 61: 59460 + 991 = 60451
Step 62: 60451 + 991 = 61442
Step 63: 61442 + 991 = 62433
Step 64: 62433 + 991 = 63424
Step 65: 63424 + 991 = 64415
Step 66: 64415 + 991 = 65406
Step 67: 65406 + 991 = 66397
Step 68: 66397 + 991 = 67388
Step 69: 67388 + 991 = 68379
Step 70: 68379 + 991 = 69370
Step 71: 69370 + 991 = 70361
Step 72: 70361 + 991 = 71352
Step 73: 71352 + 991 = 72343
Step 74: 72343 + 991 = 73334
Step 75: 73334 + 991 = 74325
Step 76: 74325 + 991 = 75316
Step 77: 75316 + 991 = 76307
Step 78: 76307 + 991 = 77298
Step 79: 77298 + 991 = 78289
Step 80: 78289 + 991 = 79280
Step 81: 79280 + 991 = 80271
Step 82: 80271 + 991 = 81262
Step 83: 81262 + 991 = 82253
Step 84: 82253 + 991 = 83244
Step 85: 83244 + 991 = 84235
Step 86: 84235 + 991 = 85226
Step 87: 85226 + 991 = 86217
Step 88: 86217 + 991 = 87208
Step 89: 87208 + 991 = 88199
Step 90: 88199 + 991 = 89190
Step 91: 89190 + 991 = 90181
Step 92: 90181 + 991 = 91172
Step 93: 91172 + 991 = 92163
Step 94: 92163 + 991 = 93154
Step 95: 93154 + 991 = 94145
Step 96: 94145 + 991 = 95136
Step 97: 95136 + 991 = 96127

So, 991*97 = 96127